LXR linux/drivers/gpu/drm/nouveau/nvkm/subdev/pci/gf100.c

   1/*
   2 * Copyright 2015 Red Hat Inc.
   3 *
   4 * Permission is hereby granted, free of charge, to any person obtaining a
   5 * copy of this software and associated documentation files (the "Software"),
   6 * to deal in the Software without restriction, including without limitation
   7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   8 * and/or sell copies of the Software, and to permit persons to whom the
   9 * Software is furnished to do so, subject to the following conditions:
  10 *
  11 * The above copyright notice and this permission notice shall be included in
  12 * all copies or substantial portions of the Software.
  13 *
  14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  17 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
  18 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
  19 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
  20 * OTHER DEALINGS IN THE SOFTWARE.
  21 *
  22 * Authors: Ben Skeggs <bskeggs@redhat.com>
  23 */
  24#include "priv.h"
  25
  26static void
  27gf100_pci_msi_rearm(struct nvkm_pci *pci)
  28{
  29        nvkm_pci_wr08(pci, 0x0704, 0xff);
  30}
  31
  32void
  33gf100_pcie_set_version(struct nvkm_pci *pci, u8 ver)
  34{
  35        struct nvkm_device *device = pci->subdev.device;
  36        nvkm_mask(device, 0x02241c, 0x1, ver > 1 ? 1 : 0);
  37}
  38
  39int
  40gf100_pcie_version(struct nvkm_pci *pci)
  41{
  42        struct nvkm_device *device = pci->subdev.device;
  43        return (nvkm_rd32(device, 0x02241c) & 0x1) + 1;
  44}
  45
  46void
  47gf100_pcie_set_cap_speed(struct nvkm_pci *pci, bool full_speed)
  48{
  49        struct nvkm_device *device = pci->subdev.device;
  50        nvkm_mask(device, 0x02241c, 0x80, full_speed ? 0x80 : 0x0);
  51}
  52
  53int
  54gf100_pcie_cap_speed(struct nvkm_pci *pci)
  55{
  56        struct nvkm_device *device = pci->subdev.device;
  57        u8 punits_pci_cap_speed = nvkm_rd32(device, 0x02241c) & 0x80;
  58        if (punits_pci_cap_speed == 0x80)
  59                return 1;
  60        return 0;
  61}
  62
  63int
  64gf100_pcie_init(struct nvkm_pci *pci)
  65{
  66        bool full_speed = g84_pcie_cur_speed(pci) == NVKM_PCIE_SPEED_5_0;
  67        gf100_pcie_set_cap_speed(pci, full_speed);
  68        return 0;
  69}
  70
  71int
  72gf100_pcie_set_link(struct nvkm_pci *pci, enum nvkm_pcie_speed speed, u8 width)
  73{
  74        gf100_pcie_set_cap_speed(pci, speed == NVKM_PCIE_SPEED_5_0);
  75        g84_pcie_set_link_speed(pci, speed);
  76        return 0;
  77}
  78
  79static const struct nvkm_pci_func
  80gf100_pci_func = {
  81        .init = g84_pci_init,
  82        .rd32 = nv40_pci_rd32,
  83        .wr08 = nv40_pci_wr08,
  84        .wr32 = nv40_pci_wr32,
  85        .msi_rearm = gf100_pci_msi_rearm,
  86
  87        .pcie.init = gf100_pcie_init,
  88        .pcie.set_link = gf100_pcie_set_link,
  89
  90        .pcie.max_speed = g84_pcie_max_speed,
  91        .pcie.cur_speed = g84_pcie_cur_speed,
  92
  93        .pcie.set_version = gf100_pcie_set_version,
  94        .pcie.version = gf100_pcie_version,
  95        .pcie.version_supported = g92_pcie_version_supported,
  96};
  97
  98int
  99gf100_pci_new(struct nvkm_device *device, int index, struct nvkm_pci **ppci)
 100{
 101        return nvkm_pci_new_(&gf100_pci_func, device, index, ppci);
 102}
 103